You can now send money in Facebook Messenger with PayPal
The new option is only available to customers in the United States starting today. However, since this is a staged roll-out, it might take up to a week for the new money service to be enabled for everyone.
In the same piece of news, PayPal announced that it has decided to introduce its first PayPal customers service bot for Messenger. Basically, this means that PayPal customers will be able to receive payment and account support directly in Messenger.
Of course, you will need a valid PayPal account in order to start sending money to your friends and family, or request funds for that matter.
source: PayPal
Things that are NOT allowed: